The finale, Cut-throat Creek, corrals you down a narrow stream in an extended gauntlet event with more spitters, tanks, chargers and hunters than you can shake a bloody chainsaw at. It's a special infected reunion party, and you're the guest of honour.

On the plus side, the AI director in this DLC campaign is more predictable than in the game proper. Enemies and items spawn with less variation, so you can plan ahead. In fact, why not prep your party with this handful of tips?